Wavelength conversion of chaotic message through gain modulation by injection-locked Fabry-Perot laser diode

<正>We propose a wavelength conversion scheme for chaotic optical communications(COC) based on a Fabry-Perot (FP) laser diode.The FP laser,as a wavelength converter,is injection-locked at one of longitudinal modes by an external continuous-wave(CW) light.The simulation results demonstrated that the chaos masked signal at wavelengthλ_1,which corresponds to the other longitudinal mode of FP laser,can be converted to the injection-locked mode(wavelengthλ_2) based on cross-gain modulation in a closed-loop COC link.A 1.2-GHz chaos masked sinusoidal signal is successfully decoded with signal-to-noise ratio (SNR) beyond 8 dB in 15-nm wavelength conversion range,and the effects of SNR on the signal frequency and conversion span are also investigated.